Unresponsive script, how to debug?

[Andrew Arfman]

Hi!

I have an awkward problem with Firefox and JavaScript. My app uses
jquery and some
plugins (datatables and timeentry). The app downloads data from my
server using $.AJAX
and puts this data in DataTables.

The problem is that every now and then the app becomes unresponsive.
If I hit reload
several times (like 1-20 times, sometimes more) and wait the app to
reload, at some point
the reload stops and after a while I get the 'Unresponsive script'
dialog:
---
Warning: Unresponsive script

A script on this page may be busy, or it may have stopped responding.
You can stop the script now, open the script in the debugger, or let
the script continue.

Debug script Continue Stop script
---

Unfortunately, 'Debug script' button doesn't do anything useful;
Firefox continues to be
unresponsive. Is there a way to actually get to the debugger in this
situation?

Any other ideas about debugging this situation?


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[John J Barton]

1.1) Install Firebug 1.5X.4 from http://getfirebug.com/releases/firebug
1.2) Open Firebug Icon Menu > Open Tracing
1.3) Tracing panel Options ERRORS and UI_LOOP
1.4) Reproduce your problem and read the Logs panel

2.1) Install Firebug 1.6Xa11 (http://getfirebug.com/releases/firebug/
1.6X) and Chromebug 1.6X.0a11 (http://getfirebug.com/releases/
chromebug/).
2.2) Run firebug from the command line with "-chromebug".
2.3) Reproduce your problem. You may be more lucky when you hit
Debugger button